No sidebar in Twenty eleven

I cant get the Twenty eleven sidebar to show up on bbPress generated pages. It works well in pages and posts, with a little trouble also got it to work in BuddyPress generated pages, but still nothing in the forums, and disabling plugins doesn’t work. Does anyone know how to fix this? I have the recent versions for everything.

I apologize for this delayed answer, for some reason i never got any email notification that someone had answered this question, even though i ticked then box. At any rate, i tried your solution, but it did not work. I even deleted all cache and web browser cache, and tried the Twenty Eleven theme without my child theme, but still no dice. When i inspect the page code there simply isn’t a “Secondary” part to it, as there should be in order for the sidebar to appear… Any idea what could be wrong?

let’s see if there is a plan for me to show the sidebar in my twenty eleven theme. renaming the sidebar-page did not do a thing. i’m using a child theme of twenty eleven and tried putting the bbpress.php there instead of into twenty eleven theme, but nothing worked.
just in case it helps looking at the site, here it is, or the start of it anyway:http://foothillfibersguild.org/forums/